Platydracus marmorellus Fauvel, 1895

Huang, Jia-Yi, Chen, Jia-Wei & Tang, Liang, 2024, The genus Platydracus Thomson in Hainan, South China (Coleoptera, Staphylinidae, Staphylininae), ZooKeys 1212, pp. 129-141 : 129-141

Platydracus marmorellus Fauvel, 1895

Figs 3 , 5–8

Staphylinus marmorellus Fauvel, 1895: 253.

Platydracus marmorellus ; Herman 2001: 14.

Material examined.

China – Hainan Prov. • 1 ♀; Ledong County, Jianfengling N. R. ; alt. 1000 m; 10–23 May 2011; BI Wen Juan leg.; SHNU • 2 ♀♀; Ledong County, Jianfengling, Mingfenggu ; 18 ° 44 ' N, 108 ° 50 ' E; alt. 950 m; 30 Apr. 2012; Peng & Dai leg.; SHNU • 1 ♂ 1 ♀; Ledong County, Jianfengling N. R., Mingfenggu ; 18 ° 44 ' 30 ″ N, 108 ° 50 ' 29 ″ E; rainforest, decaying log; alt. 995 m; 26 Jan. 2015; Peng, Yin, Tu, Song, Shen, Zhou & Wang leg.; SHNU • 1 ♀; Ledong County, Jianfengling N. R., District V ; 18 ° 43 ' 57 ″ N, 108 ° 52 ' 41 ″ E; broad-leaved forest, decaying log; alt. 975 m; 24 Jan. 2015; Peng, Yin, Tu, Song, Shen, Zhou & Wang leg.; SHNU • 3 ♀♀; Qiongzhong County, Limu Mt., path to peak ; 19 ° 10 ' 27 ″ N, 109 ° 45 ' 29 ″ E; mixed forest, decaying log; alt. 1000 m; 1 Feb. 2015; Peng, Tu, Song, Shen, Zhou & Yan leg; SHNU • 1 ♂ 1 ♀; Lingshui County, Diaoluoshan N. R. ; 18 ° 42 ' 2.66 ″ N, 109 ° 53 ' 19.32 ″ E; alt. 950–1050 m; Aug. 2023; FIT; Zhao leg.; SHNU • 1 ♀; Ledong County, Jianfengling, Mingfenggu ; 18 ° 44 ' N, 108 ° 50 ' E; alt. 950 m; 29 Apr. 2012; Peng & Dai leg.; SHNU .

Measurements.

Male: BL: 14.8–18.4 mm, FL: 8.78–9.22 mm. HL: 1.85–2.07 mm, HW: 2.59–2.82 mm, EYL: 0.82–0.89 mm, TL: 0.82–0.89 mm, PL: 2.90–3.21 mm, PW: 2.84–3.15 mm, EL: 3.21–3.89 mm, EW: 3.39–4.32 mm. HW / HL: 1.35–1.44, TL / EYL: 1.00, PL / PW: 1.02–1.13, EL / EW: 0.90–0.97. Female: BL: 12.2–14.9 mm, FL: 7.67–9.11 mm. HL: 1.70–2.07 mm, HW: 2.15–2.45 mm, EYL: 0.82 mm, TL: 0.67–0.82 mm, PL: 2.53–3.02 mm, PW: 2.47–2.96 mm, EL: 2.96–3.39 mm, EW: 3.09–3.64 mm. HW / HL: 1.18–1.32, TL / EYL: 0.82–1.00, PL / PW: 1.00–1.03, EL / EW: 0.93–0.98.

Diagnosis.

The species is widely distributed in South China, and its detailed distributional information will be listed in a forthcoming paper by Qing-Hao Zhao. In general appearance, the species is similar to P. plagiicollis ( Fairmaire, 1891) which overlaps in distribution. Yet, P. marmorellus can be easily distinguished from the latter by bearing pale appressed microsetae on the forebody, which are absent in P. plagiicollis .

Distribution.

China (Hainan), Myanmar, Vietnam, Indonesia. New to China.

Figures

Figures 1–4. Punctation of head and setae on the head and pronotum 1 P. hainanensis 2 P. juang 3 P. marmorellus with two types of setae 4 P. aureolus with one type of setae.

Figures 5–12. Habitus and aedeagus of Platydracus 5–8 P. marmorellus 9 – 12 P. juang 5, 9 dorsal habitus 6, 10 ventral habitus 7, 11 aedeagus in ventral view 8, 12 aedeagus in lateral view. Scale bars: 2.0 mm (5, 6), 1.0 mm (9, 10), 0.2 mm (7, 8), 0.5 mm (11, 12).